It is a valid point though, why should engineers help young minds learn our trade?
Perhaps when you are on your last legs (after having the previous few set replaced…) and you look over to the machine that is keeping you alive, or into the sky at the rocket which takes your grandchildren from the moon base to visit you…you can be glad that a whole new generation of engineers were created and your last years of life were so much the richer for it.
Now, now, let's keep things in perspective and stick to our priorities - there shall be no artificial limbs and moon bases until we cleared that previous bullet point on the list called "flying cars & household robot butlers/maids". Ugh, I get a feeling I shouldn't hold my breath for any of those either...
But I think you're spot on about the target demographic for any of that stuff, with that "richer" part (take current suborbital flight prices for instance - and I'm not even going to mention space tourism)...
I didn't disappear, its just that my finger slipped into a ring by accident.
Interestingly, there seem to be quite a few of these dangerous rings around. If I had a penny for every one-man open source project that just had its developer vanish into thin air following such an unfortunate accident, I'd be rich... (these things do appear to be rather slow-working though - in many instances the effect seems to be delayed up to as much as nine months... )